US2025143A - System for reception by television - Google Patents

System for reception by television Download PDF

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Publication number
US2025143A
US2025143A US475449A US47544930A US2025143A US 2025143 A US2025143 A US 2025143A US 475449 A US475449 A US 475449A US 47544930 A US47544930 A US 47544930A US 2025143 A US2025143 A US 2025143A
Authority
US
United States
Prior art keywords
screen
ray
light
elements
intensity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US475449A
Other languages
English (en)
Inventor
Vladimir K Zworykin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE381997D priority Critical patent/BE381997A/xx
Application filed by RCA Corp filed Critical RCA Corp
Priority to US475449A priority patent/US2025143A/en
Priority to GB19797/31A priority patent/GB376498A/en
Priority to DER82327D priority patent/DE565813C/de
Application granted granted Critical
Publication of US2025143A publication Critical patent/US2025143A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7425—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being a dielectric deformable layer controlled by an electron beam, e.g. eidophor projector

Definitions

  • the object of the present invention is to provide an improved television receiving system wherein an image of any desirable size and brightness may be developed on a suitable screen structure and, generally, to provide for reception by television of an image comparable in size and brightness to that of present day moving'pictures.
  • a screen of any desirable size at a television receiving station is exposed to a local light source and a. cathode ray is developed and is utilized to control the degree or mode of illumination of the screen by the light in such manner as to compose or develop an image on the screen.
  • My invention resides in an improved method and apparatus of the character hereinafter described and claimed.
  • FIG. 1 is a diagrammatic view of a television receivsing system embodying the present improvemen
  • Fig. 2 is an enlarged fragmentary view of one of the parts, looking toward the right in Fig. 1;
  • Fig. 3 is a sectional view, the section taken on a line corresponding to the line 3-3 in Fig. 2;
  • the operation of the system is as follows:
  • the elements I1 are normally positively charged due to the high positive potential impressed upon the screen I5.
  • the elements I! are therefore repelled from the surface of the screen I5 and normally are in position to permit the maximum amount of light to pass through the apertures It to illuminate the screen II.
  • the cathode ray scans the elements II, the individual elements are discharged in more or less degree, as the cathode ray strikes them, the degree of discharge, in any instance, depending upon the intensity of the ray, which in turn depends upon the strength at that instant of the received picture current.
  • the method of operation which comprises exposing a screen to a local light source of substantially'constant 40 intensity, developing a cathode ray, modulating the ray in accordance with incoming picture signals, and scanning said screen with the ray to vary the amount of light transmitted by the screen to develop a picture.
  • cathode ray apparatus comprising a tubeprovided with a screen capable of transmitting light under cathode ray bombardment and in amount proportional to the intensity of the ray, means for '50 developing a ray of electrons and directing the ray at said screen, means for varying the intensity of the ray in accordance with incoming picture signals, means for causing the my to scan said screen, and a second screen exterior of said tube 55 and disposed to receive light transmitted from said first-named screen.
  • screen structure additional screen structure interposed between the latter and said light source and provided with apertures uniformly arranged over the same for illumination of said first-named structure by said light source through said apertures, valves associated respectively with the individual apertures and operable to vary the efiective areas thereof, means for actuating said valves in accordance with received signal effects, and comprising a tube containing said secondnamed screen structure and being provided with means for developing a ray of electrons and directing the same at said second-named screen structure, and means for deflecting said ray to cause the same to scan said second-named screen structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
US475449A 1930-08-15 1930-08-15 System for reception by television Expired - Lifetime US2025143A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE381997D BE381997A (fr) 1930-08-15
US475449A US2025143A (en) 1930-08-15 1930-08-15 System for reception by television
GB19797/31A GB376498A (en) 1930-08-15 1931-07-09 Improvements in or relating to television receiving systems and cathode ray devices suitable for use therein
DER82327D DE565813C (de) 1930-08-15 1931-07-30 Lichtsteuervorrichtung fuer Fernseh-Empfaenger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US475449A US2025143A (en) 1930-08-15 1930-08-15 System for reception by television

Publications (1)

Publication Number Publication Date
US2025143A true US2025143A (en) 1935-12-24

Family

ID=23887603

Family Applications (1)

Application Number Title Priority Date Filing Date
US475449A Expired - Lifetime US2025143A (en) 1930-08-15 1930-08-15 System for reception by television

Country Status (4)

Country Link
US (1) US2025143A (fr)
BE (1) BE381997A (fr)
DE (1) DE565813C (fr)
GB (1) GB376498A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471409A (en) * 1945-09-13 1949-05-31 Standard Telephones Cables Ltd Indicating tube system
US2591308A (en) * 1950-10-20 1952-04-01 Frank K Singiser Light valve system
US2681380A (en) * 1951-09-26 1954-06-15 Us Air Force Color television projection system
US2681423A (en) * 1949-06-09 1954-06-15 Electronique Soc Gen Light reflecting screen for cathode-ray tubes
US2682010A (en) * 1951-08-07 1954-06-22 Us Air Force Cathode-ray projection tube
US2733501A (en) * 1956-02-07 Electrostatic shutter mosaic and method of manufacture
US3166635A (en) * 1961-09-25 1965-01-19 Joachim H Todt Thin film magnetic shutter display panel
US3210757A (en) * 1962-01-29 1965-10-05 Carlyle W Jacob Matrix controlled light valve display apparatus
US3553364A (en) * 1968-03-15 1971-01-05 Texas Instruments Inc Electromechanical light valve
US3678196A (en) * 1970-10-20 1972-07-18 Solo S Roth Means for projecting an enlarged television image
US3797919A (en) * 1972-06-30 1974-03-19 Nasa High-speed shutter
US4592628A (en) * 1981-07-01 1986-06-03 International Business Machines Mirror array light valve

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE952102C (de) * 1932-09-30 1956-11-08 Rca Corp Abtastverfahren fuer Fernseh-Kathodenstrahlroehren
DE751849C (de) * 1935-06-14 1954-08-09 Fernseh Gmbh Lichtsteuerschirm fuer Kathodenstrahlroehren
GB466031A (en) * 1935-11-20 1937-05-20 Marconi Wireless Telegraph Co Improvements in or relating to electrically controlled light valves
FR812987A (fr) * 1936-01-30 1937-05-21 Perfectionnements aux postes récepteurs de télévision
FR819199A (fr) * 1936-07-09 1937-10-12 Pierre Marie Gabriel Toulon Nouveau mode d'exploration destiné notamment à la télévision
DE741765C (de) * 1937-01-20 1943-11-17 Fernseh Gmbh Projektionsverfahren
US3275746A (en) * 1962-12-11 1966-09-27 Beltrami Aurelio Simultaneous multiple two-way multiplex communications systems

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733501A (en) * 1956-02-07 Electrostatic shutter mosaic and method of manufacture
US2471409A (en) * 1945-09-13 1949-05-31 Standard Telephones Cables Ltd Indicating tube system
US2681423A (en) * 1949-06-09 1954-06-15 Electronique Soc Gen Light reflecting screen for cathode-ray tubes
US2591308A (en) * 1950-10-20 1952-04-01 Frank K Singiser Light valve system
US2682010A (en) * 1951-08-07 1954-06-22 Us Air Force Cathode-ray projection tube
US2681380A (en) * 1951-09-26 1954-06-15 Us Air Force Color television projection system
US3166635A (en) * 1961-09-25 1965-01-19 Joachim H Todt Thin film magnetic shutter display panel
US3210757A (en) * 1962-01-29 1965-10-05 Carlyle W Jacob Matrix controlled light valve display apparatus
US3553364A (en) * 1968-03-15 1971-01-05 Texas Instruments Inc Electromechanical light valve
US3678196A (en) * 1970-10-20 1972-07-18 Solo S Roth Means for projecting an enlarged television image
US3797919A (en) * 1972-06-30 1974-03-19 Nasa High-speed shutter
US4592628A (en) * 1981-07-01 1986-06-03 International Business Machines Mirror array light valve

Also Published As

Publication number Publication date
BE381997A (fr)
DE565813C (de) 1932-12-08
GB376498A (en) 1932-07-14

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